Jazz is a complex and influential genre of music that originated in the African-American communities of New Orleans, United States, in the late 19th and early 20th centuries. It is characterized by its distinctive rhythm known as swing, improvisation, and the use of blue notes. Jazz played a significant role in the cultural, social, and political landscape of America, influencing numerous other genres and musicians. Notable figures in its development include Louis Armstrong, Duke Ellington, and Miles Davis, who pushed boundaries with their innovative styles and compositions.